Die for naking carburetor frames



April '26', 1927. VF. HOI-T- DIE FOR MAKING CARBURETOR FRAMES Filed April 29. 19215 a set-sneet 1 April 26, 1927. F0 Hol- T DIE FOR MAKING CARBURETOR FRAMES Filed April 29,1925 ssheets-shet Aprl 26,1927. 1,625,854 v F. HoLT DIE Fon MAKING GARBURETQR FRAMES Filed April 29. 1925' "s sheets-sheet 3 Y Y 1M Yun 2202222525; fwm w22/@2229442- j/W April 26, 1927. 1,625,854

. F. HOLT DIE FOR MAKING CARBURETOR FRAMES l Filed April 29. 1925 8 Sheets-Sheet 4 im r F'. HOLT DE FOR MAKING CARBURETOR FRIES Filed April 29, 1925 April 26,1927.

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1,625,854 F., HOLT DIE FOR'MAKING CARBURETOR FRAMES y Filed April 29. 1925 8 sheets-sheet 6 8 Sheets-Sheet '7 1 o April 26, 927 F. HOI-T DIE FOR MAKING CARBURETOR FRAMES Filed April 29. 1925 fm fri/Wt# 8 Sheets-Sheet 8 F. HOLT DIE FOR MAKING CARBURETOR FRAMES Filed April 29. 1925 April 26, 41927.

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improv@ 5 shown am ih@ 11? F ,L .far deeci'n ment W im maratea the semi-cylindrical pocket 1'1"', and the jai-v 14; having, the seinrcylindrical pocket i8 and the die pocket or space i9 opposite the die block 12. An abutment post' f2() ac-` ourately aligns the clamping jaws, and a latch hook 20 pivoted to the iaw i4 when brought into engagement with the jaw lli, as shown in Figs. 1 and 3, will securely lock the jaws together. The Work-is now ready to receive its lateral. deiection and this is accomplished hy the sl'iitingl or spreading away ot' the part 4 'from the part 3, this spreading action causing the. die block 12. to deflect a section of the metal iu the hase b into the die space or pocket 19 to form the deflection or extension CZ, Figs. 18 and 19. -The spreading tool is leest shown in Fig. (i. A. bar 21 is vertically reciprocable 1n a frame 2l', and at its outer end has the cylindrical spreader plug 22. which is cut away at its lower end to provide the inclined or Wedge surface 23 for cooperating with the inclined or wedge surface 2li on the'baclr of the movable spreader part fl. The spreader plug is reciprocated coaxially with the Work A so that it will travel. down the cylindrical neck n thereotI and with its lower end between the movable spreader part 4. and the stationary part 3, the result 'ing wedging action powerfully forcing' the 'part 4 laterally with the die block 12 against the side of the base b, to deflect out this side Ato forni the lateral projection d, already referred to. After the spreading or deflectn ing operation, the spreader plug is withdrawn and the spring l0 restores the part t to its normal position, when, after the clans ing jaws have been released, the Work,

Whic now has the shape shown in Figs. 6 18 and 10, can he readily Withdrawn troni the die structure.

The Work is now subjected to a. piercing operation in the die structure shown in Figs. 8 to l1, this piercing` operation forming a hole in the outer Wall of the deflected part d. Ripidly supported on the hase 25 ot'thc lower die structure is the plate 26 which has tli'e lugs'? at its inner end from which errtends forwardly the die mandrel 28. The top of this mandrel is shaped to t the cylindrical wall of the base part t of the work, so that the Werl: will `he held in horizontal osition, as Abest shown'Ain Fig. il. The andrei has the cylindrical pocket 29 in its u 'per side for supporting the die block 30. .This block is of such diameter and so rounded at its uaper end that it will accurately tit into tie deflection or extension part d of the Work. The die hloclr the die passageway 3l therethrough oiE a dianaq eter depending; upon the size wof the hole it is desired. to punch in the outer wall of the deflected part d, and below the passage Way the mandrel 2B has the discharge pas saaewajv 32 for the metal punched out.

The base 9.5 has 'vertical guide posts 33 for receiving the guide sleeves 3e on the plate 35 which supports the upper die member. This up er die member 1s in the form oi a head 36 'iaving the punch extension or plug 37 which is concentric with the lower die member 30. Suitable'means are provided or forcing` downwardly the plate 35 with the upper die member thereon, so that the punch 3( will 'engage' with the outer wall of the deflection part al to cut out the section thereof above the die passa eway 3i and to leave a hole 38 (Figs. 20 an 21%. The head 3G has the depending side wel s 89 and 40 for engaging with the sides of the base part b of the work, and also the front and rear walls il'and 42, whose lower edges are properly rounded for engagement, re spectiifely, with the neck n and base o of the work, the engagement of these various walls with the Werl: securely holding the Work to the mandrel E28 duringl the punchin operation. When the upper die mem er is raised the mandrel 28 will hold the work while the punch 3'? is withdrawn therefrom.

After tl e piercing operation the work is inthe condition shown in Figs. 20 and 21, the hole 38 heini ot a dial/actor reduced to an crient depending u on the length of the Hangs desired. As 'W11 be next explained' the rounded or inwardly curved section oi the deflection d will be straightened out so that a cylindrical flange will be formed to bring the work to the final shape shown in Fig. 2i. The .length of this flange will depend upon the diameter of the hole 38. If a longer flange is desired, the diameter of the hole correspondingly reduced and if a shorter flange is desired, the diameter is correspondingly increased.

in order thatthe sheet metal, rcferably steel, will respond more easily in t e various die structures, the work is annealed before each die operation. The punchin of the hole in the deflection ci has a ten ency'to causo the nietal around the ,hole to temper or harden, in other words, to become more or less brittle. This brittle metal surrounding the hole is, therefore, preferably removed before the stretchinL or expansion operation to torni the linis ed cylindrical Hangs, and the hole is, therefore, reamed flown to the setter and more ductile metal. Fig. 22 shows the Work after such roaming operation, and the work is now ready for operation in the die structure shown in ligs. i2 to 15. The supporting frame work ot this die mechanism is exactly the same as that shown in Figs. 8 to l1 for the pierc ing operation, with the exception of the die nuuidrcl f1.3 and the expansion die memher dit, which are suhstititcd for he mandrel and punch member for the piercing operation. r,the lic mandrel i3 is supported from the lug 27, its body part receiving and hfa basa pari'. i? of die iirolln, :md ih@ fnsion receiving he awk n. r ne Work 15 sjiipmted Win11 the embryo iziige y erg cnduig upwzu'ciiy und with the maimed y in the pziih oit' ijie e; Jziismni The iowa? and. oi ifi@ Mgg is iteipreci. ii; xviii 'Mw '.iasssmijfe 0E this tzwere mi ci thraiiigii.

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mecha'iiisisa :i035 inii'imtey receiv'ingsaci sileii, said' sp'iziidei"rmaaimnisim comprising ai staioiiary pant :al si im'ierailly shifciible pmt, said sixftfibie @mrt having a die block secured thereto, and :1 punger wedge ifm' @@opei-:iting with Said. spreader' mechanism to shift it shi'iabie part latemll@ Whezeby said die block will b@ Shiftec against the wail of av tubular sheli 'received by said spreader mechanism and deflected outward- 1y i0 :form nu embry flange. l

3. En, die meciiaiism for use in omiig :i intel-ai Hung@ on zr. Tubular shei, th@ conm binntion oi :i sp1-@wlw block `i'oi im'aimsitely receiving 2i sheli, said splmder Mock comw prising :i stationary maribel* and. a. laterally Shifnbie nieiiilim, :i die biock sculed to die shi'tuiiin mcmbm', Suid die block having the shzipehf the flange' intended i0 be formed :imi zi spiciuier member adapted im' Wedg- 'oicc said .shifuble member and the die Monk ihcleon iufei'ziily.

4. En di@y iiiecmnisni :for iis@ in 'fqiiiiing :i iuemi {imf-Je on :i tubular sha-ii, the c0mbinfizimi of a Spreader' bifock for intiirmteiy receiving .xi simil, Suid spreader bloclcrmin prisimg a stationary nieuwe? having a, radial Sinin und :i Shiia/iie mcmir Shifziibi@ Aim. Suid 510, fi die bisck'emued so the siii'mbii member; Said die Mock having the Simp@ 0i the iii-luge intende@ tabs formed, sind a. spreader menubar adapted foi'iwiging @iififi gagement betwmm sind staiomry membeyA fm'i Shiftribie member 'so iorcesziici shiftiibia member mltwiudiy in the 'die bleek fvjiielfwm FRANK HGM "q Sui 

